<!DOCTYPE html>
<html>

<head>
<script>

function boom()
{
  document.documentElement.offsetHeight;
  document.getElementById("x").style.counterIncrement = "a";
  document.documentElement.offsetHeight;
}

</script>

<body onload="boom();" style="-moz-column-count: 3">
  <div style="position: relative;">
    <div style="position: absolute; height: 3pt;"></div>
    <div style="position: absolute;" id="x"></div>
    <div style="position: absolute; height: 8pt;"></div>
  </div>
</body>

</html>
